This function is used to reset the large page info of all guest pages which will be used in later patch
Signed-off-by: Xiao Guangrong <xiaoguangr...@linux.vnet.ibm.com> --- arch/x86/kvm/x86.c | 25 +++++++++++++++++++++++++ arch/x86/kvm/x86.h | 2 ++ 2 files changed, 27 insertions(+), 0 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 52b4e97..8e4494c 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6951,6 +6951,31 @@ static void memslot_set_lpage_disallowed(struct kvm_memory_slot *slot, } } +static void clear_memslot_lpage_info(struct kvm_memory_slot *slot) +{ + int i; + + for (i = 1; i < KVM_NR_PAGE_SIZES; ++i) { + int lpages; + int level = i + 1; + + lpages = gfn_to_index(slot->base_gfn + slot->npages - 1, + slot->base_gfn, level) + 1; + + memset(slot->arch.lpage_info[i - 1], 0, + sizeof(*slot->arch.lpage_info[i - 1])); + memslot_set_lpage_disallowed(slot, slot->npages, i, lpages); + } +} + +void kvm_clear_all_lpage_info(struct kvm *kvm) +{ + struct kvm_memory_slot *slot; + + kvm_for_each_memslot(slot, kvm->memslots) + clear_memslot_lpage_info(slot); +} + int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) { int i; diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index e224f7a..beae540 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -108,6 +108,8 @@ static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa) return false; } +void kvm_clear_all_lpage_info(struct kvm *kvm); + void kvm_before_handle_nmi(struct kvm_vcpu *vcpu); void kvm_after_handle_nmi(struct kvm_vcpu *vcpu); int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip); -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/